The version used in the mostrar is the "Saeed & Palash Remix". It has been released on multiple releases of "At The End". The song is 9:38 minutos long.
"The Scumfrog Remix" is the version that has been used in the megamix on the soundtrack release for season 3. That version has received quite a bit más play in clubes and is considered por many to be the best remix of the song, even at the time when it came out, which is why I guess it was used instead. Either that o it might be due to licensing issues which is why several songs had different versions featured on the various soundtrack releases of the show.
I've embedded a video of the remix below. Feel free to compare it to the scene in the mostrar which I'll link here:
link They edited a bit for the mostrar though.
